I still feel the map may be a bit too large, but I think the overall layout has a lot of potential with tweaks. The main thing is that the map has a couple areas that were largely unused, and the upper route (that the bots come out of) seems a bit out of place since it basically runs behind the bulk of the map.
I think it may be a good idea to focus on the sort of "figure 8" style path, since that is kind of central to the layout.
In
this picture I would likely move the bot entrance on the left to the right side under those trees, and get rid of that area altogether.